Treadmill



FIG. 1 is a back elevation view of the treadmill showing my design.

FIG. 2 is a front elevation view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is an opposite side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear upper perspective view thereof.

Broken line portions indicate environment, such as decals, and form no part of the claimed design. 

CLAIM The ornamental design for a treadmill, as shown and described. 